Squashed commit of the following (closes #10470):

commit 5ef9d6d5714a8bf137693a7fedd8baed7988df77
Author: Aleksandr Kuzmenko <[email protected]>
Date:   Mon Nov 8 15:03:57 2021 +0300

    try with bigarray

commit 65efb21553a504016027fab5cb165399a91c5ac4
Author: Aleksandr Kuzmenko <[email protected]>
Date:   Mon Nov 8 12:09:44 2021 +0300

    unpin ctypes

.github/workflows/main.yml

@@ -90,7 +90,6 @@ jobs:
           & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'opam init mingw "https://github.com/fdopen/opam-repository-mingw.git#opam2" --comp 4.07.0+mingw${ARCH}c --switch 4.07.0+mingw${ARCH}c --auto-setup --yes 2>&1')
           & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'opam update --yes 2>&1')
           & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'cd "$OLDPWD" && opam pin add haxe . --kind=path --no-action --yes 2>&1')
-          & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'opam pin add ctypes 0.17.1 --yes 2>&1')
           & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'opam install haxe --deps-only --yes 2>&1')
           & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'opam list')
           & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'ocamlopt -v')
@@ -198,7 +197,6 @@ jobs:
           & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'opam init mingw "https://github.com/fdopen/opam-repository-mingw.git#opam2" --comp 4.07.0+mingw${ARCH}c --switch 4.07.0+mingw${ARCH}c --auto-setup --yes 2>&1')
           & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'opam update --yes 2>&1')
           & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'cd "$OLDPWD" && opam pin add haxe . --kind=path --no-action --yes 2>&1')
-          & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'opam pin add ctypes 0.17.1 --yes 2>&1')
           & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'opam install haxe --deps-only --yes 2>&1')
           & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'opam list')
           & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'ocamlopt -v')

extra/github-actions/build-windows.yml

@@ -29,7 +29,6 @@
     & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'opam init mingw "https://github.com/fdopen/opam-repository-mingw.git#opam2" --comp 4.07.0+mingw${ARCH}c --switch 4.07.0+mingw${ARCH}c --auto-setup --yes 2>&1')
     & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'opam update --yes 2>&1')
     & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'cd "$OLDPWD" && opam pin add haxe . --kind=path --no-action --yes 2>&1')
-    & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'opam pin add ctypes 0.17.1 --yes 2>&1')
     & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'opam install haxe --deps-only --yes 2>&1')
     & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'opam list')
     & "$($env:CYG_ROOT)/bin/bash.exe" @('-lc', 'ocamlopt -v')

src/dune

@@ -11,7 +11,7 @@
 	(libraries
 		extc extproc extlib_leftovers ilib javalib mbedtls neko objsize pcre swflib ttflib ziplib
 		json
-		unix str threads dynlink
+		unix str bigarray threads dynlink
 		xml-light extlib ptmap sha
 		luv
 	)